EP2344382A1 - Structure d'entrée d'air de nacelle - Google Patents
Structure d'entrée d'air de nacelleInfo
- Publication number
- EP2344382A1 EP2344382A1 EP09753139A EP09753139A EP2344382A1 EP 2344382 A1 EP2344382 A1 EP 2344382A1 EP 09753139 A EP09753139 A EP 09753139A EP 09753139 A EP09753139 A EP 09753139A EP 2344382 A1 EP2344382 A1 EP 2344382A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- partition
- inner panel
- nacelle
- upstream
- air intake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005192 partition Methods 0.000 claims description 50
- 238000011144 upstream manufacturing Methods 0.000 claims description 45
- 238000012423 maintenance Methods 0.000 description 4
- 230000005465 channeling Effects 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings, or cowlings
- B64D29/08—Inspection panels for power plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings, or cowlings
- B64D29/06—Attaching of nacelles, fairings or cowlings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
- B64D2033/0266—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes specially adapted for particular type of power plants
- B64D2033/0286—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes specially adapted for particular type of power plants for turbofan engines
Definitions
- an aircraft nacelle has a structure comprising an air intake structure, a median structure and a downstream section.
- the term “downstream” is understood here to mean the direction corresponding to the direction of the flow of cold air entering the turbojet engine.
- the term “upstream” refers to the opposite direction.
- the air inlet structure comprises at least one outer panel, at least one inner panel and one air inlet lip having an inner wall intended to be in contact with the airflow entering the turbojet engine.
- the median structure meanwhile, is intended to surround a fan of the turbojet engine. Said structure is attached to the air intake structure in a fixed manner by the one or more internal panels and movably by the outer panel or panels so as to ensure aerodynamic continuity.
- the nacelle comprises an upstream structure comprising an air intake lip and the outer panel or panels, said structure being movable relative to a fixed structure comprising the internal panel or panels.
- a mobile upstream structure makes it possible to have access to the equipment housed inside the nacelle to carry out the maintenance of the latter.
- the air intake structure in the closed position, namely the movable upstream structure is fixed on the inner panel (s) and on the median structure.
- the operator In the open position of the air intake structure, namely during the withdrawal in the upstream position of the air intake lip and the external panel or panels, the operator has access to the interior of the nacelle. It can therefore carry out the necessary maintenance operations.
- the mobile upstream structure is slid by means of guiding means.
- such guide means are in the form of a rail system.
- the internal panel or panels may be provided with at least one acoustic ferrule, in particular a honeycomb structure, so that to absorb the acoustic nuisances resulting from the operation of the turbojet engine.
- the acoustic shroud does not have a fire-compatible structure, it is necessary to place a fire-proof bulkhead downstream of its structure.
- the structure of the guide means must extend upstream of the acoustic shroud. , which makes it impossible to arrange such a constant fire protection at the downstream periphery of said ferrule.
- An object of the present invention is to provide a nacelle comprising an air intake structure does not have the aforementioned drawbacks.
- Another object of the present invention is to provide a nacelle comprising an air inlet structure provided with a fire resistant structure to protect the internal panel or panels regardless of the dimensions and shape of the guide means of the external panels of the air intake structure.
- the invention proposes a nacelle comprising an air intake structure capable of channeling an air flow towards a turbojet fan, said structure comprising at least one inner panel and one outer panel, the outer panel being adapted to be moved by guiding means so as to open the air intake structure, characterized in that it further comprises fire protection means of the inner panel, said means being capable of being moved in whole or in part when opening the air intake structure.
- the guide means of the outer panel are then no longer an obstacle to the arrangement of a fire protection structure of the inner panels of the air intake structure.
- the air intake structure of the invention comprises one or more of the following optional features considered alone or according to all the possible combinations: -
- the fire protection means comprise at least one partition shaped to separate the inner panel of the outer panel guide means when the air inlet structure is closed;
- the partition extends upstream of the inner panel; the partition is attached, at one of its ends, to an upstream portion of the outer panel and, at the opposite end, to the downstream end of the inner panel;
- the partition is adapted to be removably attached to a structure of the taillight protection partition 16; - The partition comprises centering means adapted to be fixed on corresponding centering elements provided on a fan casing;
- the partition comprises two distinct parts, a fixed downstream part intended to be fixed on the inner panel and a movable upstream part intended to be fixed on the outer panel and able to be displaced during the opening of the inlet structure; air;
- a seal is interposed between the two parts of the partition when the air inlet structure is closed;
- the partition is metallic.
- Figures 1 and 2 are views in partial longitudinal section of a first embodiment of a nacelle according to the present invention comprising an air inlet structure respectively in the closed position and in the fully open position;
- - Figure 3 is a cross section of the nacelle of Figures 1 and 2;
- Figures 4 and 5 are partial longitudinal sectional views of a second embodiment of a nacelle of the present invention comprising an air inlet structure respectively in the closed position and in the fully open position.
- a nacelle has a structure comprising an air inlet structure 1 upstream, a median structure 3 downstream of a fan casing structure 2 surrounding a motor body and and a downstream section (not shown) generally housing a thrust reversal system.
- the air inlet structure 1 is divided into three zones.
- the first zone furthest upstream is an air intake lip 1a adapted to allow optimal capture to the turbojet of the air necessary to supply the blower and the internal compressors of the turbojet engine.
- the second zone is a section 1b connected to one end of the air inlet lip 1a comprising at least one outer panel 10.
- the third zone is a section 1c connected to the other end of the inlet lip. 1a air and having at least one inner panel 11 for properly channeling air to the blades (not shown) of the blower.
- the air intake structure 1 also comprises a partition 12 separating the air inlet lip 1a from the remainder of said structure 1.
- This partition 12 thus makes it possible to define a sealed cavity 13 within which equipment, such as that de-icing equipment, for example pneumatic or electric, are arranged to ensure the operation of the nacelle.
- the middle structure 3 comprises, meanwhile, a motor housing attached at one end to the downstream end of the structure 2 of the fan casing 20 and, at the opposite end, to the downstream section.
- the median structure 3 is, moreover, attached to an upstream end to the air inlet structure 1 through the structure 2 of the fan casing 20 so as to provide aerodynamic continuity.
- the inner panel 11 of the air intake structure 1 comprises an acoustic shroud intended to reduce noise pollution due to the operation of the turbojet engine and the vibrations of the structure.
- This acoustic ferrule is typically made of a honeycomb structure or any other structure known to those skilled in the art for absorbing noise.
- the air intake lip 1a is fixed to the outer panel 10 and to the inner panel 11 so as to form a single piece which can be dismantled, referred to as mobile upstream structure.
- the air intake lip 1a can be integrated in the outer panel 10 and the inner panel 11.
- the air inlet structure 1 is removably attached to a fixed structure comprising the housing structure 2 and the middle structure 3.
- FIG. 1 illustrates the air inlet structure 1 in the closed position, the outer and inner panels 10 ensuring the aerodynamic continuity of the outside of the nacelle while FIG. 2 corresponds to the inlet structure of FIG. air 1 in full open position thus allowing access to the equipment housed inside the nacelle to perform their maintenance.
- the latter is typically provided with guiding means 30 capable of allowing a axial sliding of the outer panel 10 upstream of the nacelle.
- the guide means 30 comprise a rail system 31 and movable mounting means 32 of the outer panel 10 on the rail system 31.
- the mounting means 32 and the rail system 31 may have Any forms capable of allowing a substantially rectilinear longitudinal displacement of the mounting means 32 with respect to the rail system 31.
- FIGS. 1 to 3 illustrates a nonlimiting example of a rail system 31 which can extend from the downstream end of the fan casing structure 2 upstream beyond the interface between the inner panel 11 and the housing 20 over a large part of the length of the inner panel 11.
- a slide 33 fixed at one of its ends to the outer panel 10 is able to slide longitudinally on the rail 34 fixed on the fixed structure relative to the axis of the nacelle so as to drive the movable upstream structure in translation.
- the air intake structure 1 further comprises means 40 for protecting against the fire of the inner panel 11 able to be displaced with the movable upstream structure when the outer panel 10 slides axially through the means 30 to ensure the opening of the air inlet structure 1.
- the guide means 30 of the outer panel 10 and, consequently, of the movable upstream structure are no longer an obstacle to the arrangement of a fire-resistant structure intended to protect the internal panel (s) 11 of the structure of the structure. air inlet 1.
- These fire protection means 40 comprise a partition 41 shaped to separate the inner panel 11 from the guide means 30 of the outer panel 10 when the air inlet structure 1 is in the position of closing.
- This partition 41 extends upstream of the air inlet structure 1 beyond the interface between the inner panel 11 and the housing 20, opposite the usual partition 12 of the lip sealing 1a.
- this partition 41 is attached at its upstream end to an upstream portion of the outer panel 10 upstream of the upstream end of the guide means 30 and, more specifically, of the rail system 31 via a flange. fastening 15 fixed to the outer panel 10 or any other means known to those skilled in the art.
- the fire protection partition 41 is fixed at its downstream end by any known means at one end of a rear light protection partition 16 extending in a plane perpendicular to the longitudinal axis of the nacelle, this partition 16 being attached at its opposite end to the inner panel 11.
- An alternative embodiment may provide that the fire protection partition 41 and the rear light protection partition 16 form a single piece.
- the fire protection partition 41 is metallic. However, other types of partition can be proposed.
- the inner panel 11 is isolated from the means of guidance 30 in a sealed cavity 42 outside the fire zone of the nacelle, this cavity being defined in particular by the fire protection partition 41 and the usual partition 12 of the air intake lip 1a when the structure of the air inlet 1 is in the closed position.
- the fire protection partition 41 further comprises centering means 50 complementary to the fixed structure so as to accurately center said partition and, consequently, the movable upstream structure to the fixed structure.
- the partition 41 comprises a centering element 51 attached to its downstream end and adapted to be centered on a corresponding element 52 fixed on a flange 53 at the upstream end of the casing 20, which makes it possible to ensure the aerodynamic continuity between the downstream end of the inner panel 11 and the upstream end of the casing 20 when the air inlet structure 1 is in the closed position
- centering elements are all elements known to those skilled in the art .
- rigid centering means such as centering pins adapted to cooperate with corresponding bores, and / or flexible to ensure structural continuity, such as an elastic tongue.
- roller centering systems as, for example, those described in the application FR 08/03558.
- centering elements 51, 52 make it possible to ensure the purest aerodynamic continuity possible.
- a peripheral seal 54 indifferently disposed at the interface on one or the other of the flange of the casing 20 or the rear light protection partition 16 ensures a seal between the cavity containing the rail system 31 and the internal of the internal panel 11. Any seal known to those skilled in the art may be interposed between the rear light partition 16 or the flange for fixing the fire protection partition 41 on the inner panel 11 and the housing 20.
- An alternative embodiment of the The present invention provides nacelles comprising several guide means 30 distributed around the acoustic shell of the inner panel 11.
- a fire protection partition 41 as described previously with reference to FIGS. 1 to 3 may be arranged between each of the guide means 30 and the acoustic shroud of the inner panel 11.
- the air inlet structure 1 comprises fire protection means 60 of the inner panel 11 adapted to be partially displaced during its opening.
- the inner panel 11 is fixed at its downstream end to an upstream end of the housing 20 forming with the housing 20 the fixed structure of the nacelle. It is no longer part of the mobile upstream structure of the latter.
- a partition 61 of fire protection of the inner panel 11 similar to the partition as described in Figures 1 and 2 is used with the difference that it has two parts, namely a downstream portion 62 fixed at its downstream end to the inner panel 11 and more precisely on the rear lamp protection partition 16 thus belonging to the fixed structure and an upstream portion 63 fixed on an upstream portion of the outer panel 10 thus belonging to the movable upstream structure.
- the upstream portion 63 of the partition 61 is then able to be displaced when the outer panel 10 slides axially to open the air inlet structure 1, as illustrated in FIG.
- the junction zone between the two upstream and downstream parts 62, 63 of the fire protection partition 61 is situated at the upstream end of the inner panel 11.
- a seal 64 is interposed between the two parts 62,63 of the partition 61 fire protection. It is arranged on one or other of the two parts 62, 63 of the partition 61. Of course, its constitution is chosen to hold fire.
- the downstream end of the air inlet lip 1a and the upstream end of the inner panel 11 are fixed together by means of means 70 similar to those described with reference to Figures 1 and 2. This ensures the aerodynamic continuity between the movable upstream structure and the fixed structure when the air inlet structure 1 is in the closed position.
- the usual partition 12 of the air inlet lip 1a thus comprises a centering element 71 attached to its downstream end, able to center on a corresponding element 72. attached to a flange at the upstream end of the inner panel 11.
- a peripheral seal 64 indifferently disposed at the interface on one or the other of the flange of the inner panel 11 or the centering means 70 of the usual partition 12 of the air intake lip 1a assures a seal between the cavity containing the guide means 30 and the internal of the inner panel 11.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0806315A FR2938238B1 (fr) | 2008-11-13 | 2008-11-13 | Structure d'entree d'air de nacelle |
PCT/FR2009/001245 WO2010055220A1 (fr) | 2008-11-13 | 2009-10-23 | Structure d'entrée d'air de nacelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2344382A1 true EP2344382A1 (fr) | 2011-07-20 |
EP2344382B1 EP2344382B1 (fr) | 2016-04-20 |
Family
ID=40786170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09753139.6A Not-in-force EP2344382B1 (fr) | 2008-11-13 | 2009-10-23 | Structure d'entrée d'air de nacelle |
Country Status (8)
Country | Link |
---|---|
US (1) | US20110214405A1 (fr) |
EP (1) | EP2344382B1 (fr) |
CN (1) | CN102186724B (fr) |
BR (1) | BRPI0920293A2 (fr) |
CA (1) | CA2736594A1 (fr) |
FR (1) | FR2938238B1 (fr) |
RU (1) | RU2516899C2 (fr) |
WO (1) | WO2010055220A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8181905B2 (en) * | 2008-12-17 | 2012-05-22 | Rohr, Inc. | Aircraft engine nacelle with translating inlet cowl |
GB201406277D0 (en) | 2014-04-08 | 2014-05-21 | Rolls Royce Deutschland | A gas turbine inlet |
FR3075761A1 (fr) * | 2017-12-21 | 2019-06-28 | Airbus Operations | Partie anterieure de nacelle d'un ensemble propulsif comportant un cadre de rigidification incline |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4759513A (en) * | 1986-09-26 | 1988-07-26 | Quiet Nacelle Corporation | Noise reduction nacelle |
SU1721979A1 (ru) * | 1990-03-19 | 2005-02-20 | Московский машиностроительный завод им. С.В.Ильюшина | Гондола силовой установки летательного аппарата |
GB9424495D0 (en) * | 1994-12-05 | 1995-01-25 | Short Brothers Plc | Aerodynamic low drag structure |
FR2757823B1 (fr) * | 1996-12-26 | 1999-03-12 | Aerospatiale | Nacelle de turboreacteur a ecoulement laminaire |
FR2771451B1 (fr) * | 1997-11-21 | 2000-04-14 | Aerospatiale | Dispositif de protection pour capot d'entree d'air de moteur a reaction, pourvu d'un systeme de degivrage |
FR2787509B1 (fr) * | 1998-12-21 | 2001-03-30 | Aerospatiale | Structure d'entree d'air pour moteur d'aeronef |
US6340135B1 (en) * | 2000-05-30 | 2002-01-22 | Rohr, Inc. | Translating independently mounted air inlet system for aircraft turbofan jet engine |
FR2868123B1 (fr) * | 2004-03-29 | 2006-06-23 | Airbus France Sas | Structure d'entree d'air pour moteur d'aeronef |
FR2869360B1 (fr) * | 2004-04-27 | 2006-07-14 | Airbus France Sas | Ensemble reducteur de bruit pour turboreacteur d'aeronef |
SE528006C2 (sv) * | 2004-12-23 | 2006-08-01 | Volvo Aero Corp | Statisk gasturbinkomponent och förfarande för reparation av en sådan komponent |
FR2890378B1 (fr) * | 2005-09-08 | 2009-01-16 | Airbus France Sas | Capot de nacelle pour turboreacteur et nacelle comportant au moins un tel capot. |
FR2906568B1 (fr) * | 2006-10-02 | 2012-01-06 | Aircelle Sa | Structure d'entree d'air deposable pour nacelle de turboreacteur. |
-
2008
- 2008-11-13 FR FR0806315A patent/FR2938238B1/fr not_active Expired - Fee Related
-
2009
- 2009-10-23 CN CN200980141126.8A patent/CN102186724B/zh not_active Expired - Fee Related
- 2009-10-23 US US13/129,226 patent/US20110214405A1/en not_active Abandoned
- 2009-10-23 RU RU2011123117/11A patent/RU2516899C2/ru not_active IP Right Cessation
- 2009-10-23 BR BRPI0920293A patent/BRPI0920293A2/pt not_active IP Right Cessation
- 2009-10-23 EP EP09753139.6A patent/EP2344382B1/fr not_active Not-in-force
- 2009-10-23 CA CA2736594A patent/CA2736594A1/fr not_active Abandoned
- 2009-10-23 WO PCT/FR2009/001245 patent/WO2010055220A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010055220A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2011123117A (ru) | 2012-12-20 |
CA2736594A1 (fr) | 2010-05-20 |
CN102186724A (zh) | 2011-09-14 |
FR2938238B1 (fr) | 2010-11-12 |
FR2938238A1 (fr) | 2010-05-14 |
RU2516899C2 (ru) | 2014-05-20 |
WO2010055220A1 (fr) | 2010-05-20 |
US20110214405A1 (en) | 2011-09-08 |
BRPI0920293A2 (pt) | 2016-02-16 |
CN102186724B (zh) | 2015-04-08 |
EP2344382B1 (fr) | 2016-04-20 |
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